function showmenu(ob)
{
document.getElementById(ob).style.visibility="visible"
}
function hidemenu(ob)
{
document.getElementById(ob).style.visibility="hidden"
}

function coloron(obs)
{
document.getElementById(obs).style.backgroundColor="orange"
}

function coloroff(obs)
{
document.getElementById(obs).style.backgroundColor="transparent"
}





function blinking_header()
{
if (!document.getElementById('blink').style.color)
	{
	document.getElementById('blink').style.color="blue";
	}
if (document.getElementById('blink').style.color=="blue")
	{
	document.getElementById('blink').style.color="black";
	}
else
	{
	document.getElementById('blink').style.color="blue";
	}
timer=setTimeout("blinking_header()",200);
}

function stoptimer()
{
clearTimeout(timer);
}